With United 12 points clear at the top of the table, Redknapp believes their focus may be drawn to Real, after a 1-1 draw in the first leg at the Bernabeu left the last-16 tie neatly poised.

However, as the return match at Old Trafford does not take place until March 5, Redknapp expects United to be at full strength.

"Unfortunately they've not got their eye on Real Madrid," he said. "They're looking to win the league again. United don't take their eye off the ball too often. You'd rather play them when their next game is Real Madrid.

"They're full of quality players. That's why they're top of the league. We've got to be at it tomorrow. They've kept pulling out results and other teams have had bad runs. Only Man United have been consistent and picked up results on a consistent basis. You'd be very surprised if they didn't win the league."

Despite his admiration for Sir Alex Ferguson's men, Redknapp insisted that, in their situation, QPR cannot pick and choose where their wins will come and that they must not view Saturday's game at Loftus Road as a "bonus".

"I don't think you can look at games like that," he said. "You wouldn't see Chelsea, Spurs, Man City [doing that]. When you play Norwich at home, you think: 'We can win there'. You can't pick football results."

He added: "It's a big game. We've been on a good run until last week [the 4-1 defeat to Swansea]. We've played Man City, Tottenham and Chelsea. Last week was the first setback. It was that defeat that set us back again. We've got to try and pick up some wins."